Loose-leaf binder



1..,C. DAWSON.

LOOSE LEAF BINDER. APPLICATION FILED MAY 5. 1919.

rugs.

'JAMES c. DAWSON, lor wEB'sirER GROvias;ivi-Isisouin.4 Y'

LOOSE-LEAF BINDER."

Application led May 5,

To all whom t 'may concern.'

Be it known that I, JAMES C. DAWSON, a citizen of the United States, and resident of Vebster, Groves, countyof St. Louis, and State of Missouri, have invented certain new and useful Improvements in Loose-Leaf Binders, of which the following is a specification and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to loose leaf binders and more particularly to those of that type commonly known as prong binders and which comprise a pair of hingedly connected plates each having curved filling prongs extending toward the other plate.

The objectof the invention is to provide a binder of the type described which shall be of-i'ncreased strength but of inexpensive and durable construction and eilicient in operation.

In the accompanying drawings,

Fig. 1 is front view of a loose leaf binder embodying the features of improvement provided by the invention; l

Fig. 2 is an end view of the binder showing the parts in closed position;

Fig. 3 is similar to Fig. V2 but shows the parts in open position; and

Fig. 4 is a sectional Vview taken on Vt-he line 4.--4 of Fig. 1.

The improved binder preferably comprises a. pair of sheet metal angle. plates 13, 14,

v hingedly connected along their inner el'ges,

as through a pair of leaf hinges 15 welded onto the plates. In carrying out the invention, the side flanges of the angle plates 13 14, are formed to comprise upright inner porti-ons 16 and outwardly inclined mar-V ginal portions. 17. The filing prongs .21,

22, extend between the inclined portions 17 p of the plate flanges and increased strength and greater vfreedomof movement of the sheets (not shown), when filed upon the prongs, are obtained by so inclining the flange portions 17 that they are normal to the prongs.

As is usual in binders of the type illustrated, the filing prongs 21, 22, are arranged in pairs and one of the prongs of each pair is carried by each of the angle plates 13, 14. `In the specific construction shown, the prongs 21, 22, are each formed with an enlarged flat head 25 at one end. When so Specification of Letters Patent. ]?u,te31i3sd Apr. 25, 1922.

1919. Serial No. 294,766.

21 or 22, carried by the other plate, in the-v l closed position of the binder.

AV convenient form of latch for holding' the parts of Vthe binder in closed position is readily provided if the angle plates 13,

14 are also formed with end flanges 27 28.,

As shown, a leaf'spring 26 is welded against the end flange 27 of each plate, 13,14, upon the inside of the same and extends over the other plate. An outwardly facing rounded knob or button 29 mounted upon each leaf spring 26 near the free end of the same, registers with and enters an' aperture 30 in the adjacent end flange 28 inthe closed position of the parts. Y i f The binder is reenforced and a symmetrical external form is obtained b fitting a filler strip 11 against the uprig t and inclined portions 16, 17 of each of the angle plates 13, 14, upon the outside of the same.

The fillery strips `11 maybe secured in position by rivets, not shown, passed through the filler strips and through the upright flange portions 16 of the corresponding angle plates.

manner.

I claim as my invention: 1. In a loose leaf binder, in combination, a pair ofV hingedly connected sheet metal The covers 10 are hingedly unitedV with the filler strips 11 in any well known4 angle plates, one flange of reachplate having an upright inner portion, and an inplates about the said axis as its center ofv curvature, a filler strip fitted against the upright and inclined portions of said flange of each plate upon the outside of the `same and a cover hingedly connected with each of the said filler strips.

2. In a loose leaf binder, in combination,

a pair of hingedly connected` sheet metal angle plates having upstanding Spacedhine and a filler strip Secured between said apart angeS, an inclined marginal portion faelngs beyond the hinge and tted against on each upstanding flange, a curved ilng the upright-,and inclined portions of one oi 10 prong extending between the inclined marsaid angle plates upon the outside of the ginal portions, a cover member having flexsame.

ible faeings secured to its opposite faces and joined at the edge of the member to' form a JAMES C. DAVSON. 

